CA1108281A - Dormant oscillator ground to neutral protection for ground fault interrupters - Google Patents

Dormant oscillator ground to neutral protection for ground fault interrupters

Info

Publication number
CA1108281A
CA1108281A CA211,306A CA211306A CA1108281A CA 1108281 A CA1108281 A CA 1108281A CA 211306 A CA211306 A CA 211306A CA 1108281 A CA1108281 A CA 1108281A
Authority
CA
Canada
Prior art keywords
amplifier
ground
circuit
protective system
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA211,306A
Other languages
English (en)
French (fr)
Other versions
CA211306S (en
Inventor
Donald L. Van Zeeland
Russell P. Schuchmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cutler Hammer World Trade Inc
Original Assignee
Cutler Hammer World Trade Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cutler Hammer World Trade Inc filed Critical Cutler Hammer World Trade Inc
Application granted granted Critical
Publication of CA1108281A publication Critical patent/CA1108281A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/331—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers responsive to earthing of the neutral conductor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
CA211,306A 1974-01-21 1974-10-11 Dormant oscillator ground to neutral protection for ground fault interrupters Expired CA1108281A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US434,988 1974-01-21
US434988A US3878435A (en) 1974-01-21 1974-01-21 Dormant oscillator ground to neutral protection for ground fault interrupters

Publications (1)

Publication Number Publication Date
CA1108281A true CA1108281A (en) 1981-09-01

Family

ID=23726532

Family Applications (1)

Application Number Title Priority Date Filing Date
CA211,306A Expired CA1108281A (en) 1974-01-21 1974-10-11 Dormant oscillator ground to neutral protection for ground fault interrupters

Country Status (7)

Country Link
US (1) US3878435A (de)
CA (1) CA1108281A (de)
DE (1) DE2502322C2 (de)
ES (1) ES433976A1 (de)
FR (1) FR2258729B3 (de)
GB (1) GB1462605A (de)
IT (1) IT1028468B (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013929A (en) * 1975-04-14 1977-03-22 Square D Company Multiple duty components of a ground fault receptacle
DE2602534A1 (de) * 1976-01-23 1977-07-28 Siemens Ag Fehlerstrom-schutzschalter
FR2453490A1 (fr) * 1979-04-06 1980-10-31 Telemecanique Electrique Dispositif de protection des personnes contre les contacts directs avec l'un des conducteurs de phase d'un reseau de distribution electrique et de protection contre les defauts d'isolement du conducteur neutre
US4268885A (en) * 1979-08-02 1981-05-19 Slater Electric Inc. GFI Sensor circuit
US4685022A (en) * 1985-05-10 1987-08-04 Square D Company Ground fault circuit interrupter capable of deriving energy from ground fault current in order to achieve circuit interruption in the presence of a reduced supply voltage
US5485340A (en) * 1991-07-08 1996-01-16 Aditan, Inc. Electrical supply safety plug
US5426552A (en) * 1991-07-08 1995-06-20 Aditan, Inc. Electrical supply safety socket
US5969921A (en) * 1998-01-29 1999-10-19 Eaton Corporation Ground fault electrical switching apparatus for coordinating tripping with a downstream ground fault switch
US6707652B2 (en) 2002-07-10 2004-03-16 Eaton Corporation Electrical switching apparatus including glowing contact protection
US6948846B2 (en) * 2003-10-23 2005-09-27 Eaton Corporation Test apparatus for power circuits of an electrical distribution device
US8085516B1 (en) 2008-07-11 2011-12-27 Fairchild Semiconductor Corporation Ground fault circuit interrupter with self test

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813579A (en) * 1970-11-09 1974-05-28 Rucker Co Electric receptacle assembly with ground fault protection
US3737726A (en) * 1972-03-28 1973-06-05 Heinemann Electric Ltd Earth leakage detector for operating circuit interrupting means
US3772569A (en) * 1972-09-05 1973-11-13 Rucker Co Ground fault protective system
US3800189A (en) * 1972-11-28 1974-03-26 Amf Inc Apparatus for detecting a ground connection on load side of neutral conductor

Also Published As

Publication number Publication date
IT1028468B (it) 1979-01-30
FR2258729B3 (de) 1977-10-21
DE2502322C2 (de) 1984-11-29
GB1462605A (en) 1977-01-26
DE2502322A1 (de) 1975-07-24
FR2258729A1 (de) 1975-08-18
ES433976A1 (es) 1976-11-16
US3878435A (en) 1975-04-15

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Legal Events

Date Code Title Description
MKEX Expiry